EP2193601A2 - Verteilter rauscharmer verstärker - Google Patents

Verteilter rauscharmer verstärker

Info

Publication number
EP2193601A2
EP2193601A2 EP08835934A EP08835934A EP2193601A2 EP 2193601 A2 EP2193601 A2 EP 2193601A2 EP 08835934 A EP08835934 A EP 08835934A EP 08835934 A EP08835934 A EP 08835934A EP 2193601 A2 EP2193601 A2 EP 2193601A2
Authority
EP
European Patent Office
Prior art keywords
amplifier
output
input
noise
transmission medium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08835934A
Other languages
English (en)
French (fr)
Other versions
EP2193601B1 (de
Inventor
Barend Visser
Petrus Paulus Kruger
Ocker Cornelis De Jager
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
North West University
Original Assignee
North West University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by North West University filed Critical North West University
Publication of EP2193601A2 publication Critical patent/EP2193601A2/de
Application granted granted Critical
Publication of EP2193601B1 publication Critical patent/EP2193601B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • H03F1/18—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of distributed coupling, i.e. distributed amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/60—Amplifiers in which coupling networks have distributed constants, e.g. with waveguide resonators
    • H03F3/605—Distributed amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/294—Indexing scheme relating to amplifiers the amplifier being a low noise amplifier [LNA]

Definitions

  • This invention relates to low noise amplifiers and more particularly to a distributed low noise amplifier.
  • the amplifiers may typically, but not exclusively, find application in radio telescope applications.
  • harmonic LNA's used in radio telescopes.
  • These harmonic LNA's comprises a single transistor in the first amplification stage, At each frequency, the transistor has a minimum noise figure, Fmin, which is achieved when the transistor is connected to an input impedance Zo P t.
  • An impedance matching circuit is therefore required to match the amplifier's input impedance to the transistor's optimum low noise impedance, Zw Harmonic amplifiers have two main disadvantages. Firstly, due to the harmonic nature of the impedance matching circuit, the LNA's low noise performance degrades over large bandwidths and secondly, the impedance matching circuit also results in signal loss, insertion loss and additional noise generated by the circuit.
  • Another well-known amplifier arrangement is the distributed amplifier.
  • Distributed amplifiers are capable of very large amplification bandwidths and have better linearity and dynamic range than harmonic amplifiers. They are therefore ideally suited as broadband amplifiers in radio telescopes, except for their noise figure. It is well known that distributed
  • LNA's have a higher noise figure than harmonic LNA's.
  • a distributed amplifier comprises an input transmission medium with an input for the amplifier at one end thereof, an output transmission medium with an output for the amplifier at one end thereof and a number of amplifier parts, with the input of each amplifier part connected to the input transmission medium and the output of the amplifier part to the output transmission medium.
  • the input transmission medium together with the input impedance of the amplifier parts, which is normally capacitive, form a transmission line.
  • When a signal is applied to the amplifier it propagates along the input transmission medium. As the signal passes each part, it is amplified and added to the output transmission medium.
  • the amplified signals are added in phase on the output transmission medium.
  • the signals from each amplifier part arrive at the same time at the output of the amplifier.
  • the time delay from the input, through each amplifier part, to the output is the same for each part (that is when the difference is much less than the period of the input signal).
  • the total power gain is A ⁇ (Avin) 2 .
  • each amplifier part also generates noise that is transferred to the output transmission medium. If each part transfer has a noise power of Ni,o, the total noise added tot the output transmission medium is No -Nhofi, because the noise of the amplifier parts is uncorrelated. The noise figure (or noise-signal ratio) therefore decreases inversely to the number of parts No/Aotf/n. But some noise generated by each part is also transferred to the input transmission medium. This input noise is then amplified by the other parts and added to the output transmission medium, similar to the signal, giving an amplified input noise Ni,,xn 2 at the output. The total amplified input noise is then N, ⁇ n 3 for many parts.
  • a distributed amplifier has therefore an optimum number of parts, for which the total noise-signal ratio is a minimum.
  • CTM H '9 h Electron Mobility Transistors
  • a distributed amplifier having an amplification bandwidth extending from a first frequency to a second higher frequency
  • the distributed amplifier comprising: an input transmission medium having a first end and a second end and providing an input for the amplifier at the first end; an output transmission medium having a first end and a second end and providing an output for the distributed amplifier at the second end; an amplifier arrangement comprising at least first and second amplifier parts connected at an input of the arrangement to the input transmission medium and at an output of the arrangement to the output transmission medium, to provide at least first and second paths for an input signal from the input of the distributed amplifier to the output of the distributed amplifier;
  • a difference of larger than the inverse of twelve times the second frequency equates to a phase difference of larger than 30 degrees.
  • the difference is larger than 45 degrees, more preferably larger than 60 degrees and most preferably about 90 degrees.
  • a distributed amplifier having an amplification bandwidth extending from a first to a second higher frequency
  • the distributed amplifier comprising: - an input transmission medium having a first end and a second end and providing an input for the distributed amplifier at the first end; an output transmission medium having a first end and a second end and providing an output for the distributed amplifier at the second end; an amplifier arrangement comprising at least first and second amplifier parts connected at an input of the arrangement to the input transmission medium and at an output of the arrangement to the output transmission medium, to provide first and second paths for an input signal from the input of the distributed amplifier to the output of the distributed amplifier; the first path being associated with a first time delay and the second path being associated with a second time delay, there being a difference between the first time delay and the second time delay; and - the difference being larger than an inverse of twelve times the second frequency for frequencies in a noise suppression band to cause a phase difference between noise generated by the amplifier arrangement propagating along the first and second paths and destructive interference of the noise before the
  • the input transmission medium 12 is then terminated at first and second ends thereof by a first and second input respectively.
  • the input has very little noise and is therefore a good low noise terminator.
  • the isolation between the two amplifiers inputs over a broad bandwidth is proportional to the inverse of the number of amplifier parts. Many amplifier parts are therefore required for good isolation.
  • This noise figure has a minimum when the skewing phase ⁇ s is chosen such that l + cos(g J- ⁇ , ) _ ⁇ - ccos( ⁇ ( )
  • the optimum skewing phase is about 90 degrees and it reduces the first amplifier parts noise figure with a factor of 5.
  • the optimum skewing reduce the noise figure of the amplifier 10 with a factor of about 1/ ⁇ - c) ⁇ 2.
  • Figure 3 is a diagrammatic illustration of another embodiment of a skewed amplifier 10 according to the invention.
  • An impedance of the output transmission medium 18 decreases in a direction from the first end 28 thereof to the output 22 of the amplifier.
  • An impedance of the input transmission medium 12 increases in a direction from the first end 14 of the first transmission medium to the second end 16 thereof.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Microwave Amplifiers (AREA)
EP08835934.4A 2007-10-01 2008-10-01 Verteilter rauscharmer verstärker Not-in-force EP2193601B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200708363 2007-10-01
PCT/IB2008/053997 WO2009044353A2 (en) 2007-10-01 2008-10-01 A distributed low noise amplifier

Publications (2)

Publication Number Publication Date
EP2193601A2 true EP2193601A2 (de) 2010-06-09
EP2193601B1 EP2193601B1 (de) 2016-02-10

Family

ID=40263255

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08835934.4A Not-in-force EP2193601B1 (de) 2007-10-01 2008-10-01 Verteilter rauscharmer verstärker

Country Status (9)

Country Link
US (1) US8344807B2 (de)
EP (1) EP2193601B1 (de)
JP (1) JP5086439B2 (de)
KR (1) KR101484056B1 (de)
CN (1) CN101816123B (de)
AU (1) AU2008306500B2 (de)
NZ (1) NZ584234A (de)
WO (1) WO2009044353A2 (de)
ZA (1) ZA201001898B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113296396A (zh) * 2021-05-26 2021-08-24 广东电网有限责任公司 一种高频噪声功率增益的自动跟踪系统及方法

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101321185B1 (ko) * 2012-09-13 2013-10-23 삼성전기주식회사 캐리어 부재
EP2770634B1 (de) 2013-02-25 2018-09-19 Telefonaktiebolaget LM Ericsson (publ) Verteilte Leistungsverstärkerschaltung
WO2014178261A1 (ja) * 2013-04-30 2014-11-06 三菱電機株式会社 分布型増幅器
US9825603B2 (en) * 2015-10-05 2017-11-21 Qorvo Us, Inc. Active drain terminated distributed amplifier
KR20170050397A (ko) * 2015-10-30 2017-05-11 전자부품연구원 위상 변환기를 이용하여 잡음을 제거하는 저 잡음 증폭기
US10340858B2 (en) 2016-07-12 2019-07-02 Qorvo Us, Inc. Linearized distributed amplifier architecture
US11171623B2 (en) * 2018-10-17 2021-11-09 Vayyar Imaging Ltd. Transmission-line-based signal distribution and aggregation
CN109450392A (zh) * 2018-12-27 2019-03-08 苏州英诺迅科技股份有限公司 一种分布式射随放大器
US11498442B2 (en) * 2019-09-17 2022-11-15 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Systems and methods for noise cancellation in protective earth resistance check of vehicle onboard battery charger
CN115360986B (zh) * 2022-08-30 2025-10-28 西北大学 一种超低功耗超宽带低噪声放大器

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US4092616A (en) * 1976-11-22 1978-05-30 General Dynamics Corporation Electronics Division Traveling wave power combining apparatus
GB8707508D0 (en) * 1987-03-30 1987-09-09 Era Patents Ltd Amplifier circuits
US5055795A (en) * 1990-05-29 1991-10-08 At&T Bell Laboratories Traveling wave type transversal equalizer
DE4123437C2 (de) * 1991-07-16 2001-01-04 Daimler Chrysler Ag Transistor-Kettenverstärker und Verfahren zur Verbesserung der Rauschzahl
US5365197A (en) * 1993-06-30 1994-11-15 Texas Instruments Incorporated Low-noise distributed amplifier
ATE365994T1 (de) * 1999-09-15 2007-07-15 Univ Northwest Verstärkungsanordnung mit niedrigem rauschen
JP3517780B2 (ja) * 2000-02-22 2004-04-12 日本電信電話株式会社 能動終端回路およびこれを用いた分布増幅器
US6819181B2 (en) 2001-12-21 2004-11-16 Motorola, Inc. Method and structure for integrated circuit interference isolation enhancement
US6597243B1 (en) * 2001-12-31 2003-07-22 Agere Systems, Inc. Distributed amplifier having a tapered transconductance architecture
US6650185B1 (en) 2002-04-26 2003-11-18 Motorola, Inc Frequency selective distributed amplifier
US7129783B2 (en) * 2004-10-25 2006-10-31 The Aerospace Corporation Hybrid active combiner and circulator
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US7279980B2 (en) * 2005-04-28 2007-10-09 Regents Of The University Of California Non-uniform distributed multi-stage circuits
JP4792273B2 (ja) * 2005-10-18 2011-10-12 株式会社日立国際電気 増幅器

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113296396A (zh) * 2021-05-26 2021-08-24 广东电网有限责任公司 一种高频噪声功率增益的自动跟踪系统及方法
CN113296396B (zh) * 2021-05-26 2022-06-03 广东电网有限责任公司 一种高频噪声功率增益的自动跟踪系统及方法

Also Published As

Publication number Publication date
WO2009044353A2 (en) 2009-04-09
US20100283546A1 (en) 2010-11-11
WO2009044353A3 (en) 2009-05-22
CN101816123A (zh) 2010-08-25
JP2010541450A (ja) 2010-12-24
CN101816123B (zh) 2014-08-13
HK1143666A1 (en) 2011-01-07
KR20100059927A (ko) 2010-06-04
AU2008306500B2 (en) 2012-05-17
JP5086439B2 (ja) 2012-11-28
AU2008306500A1 (en) 2009-04-09
ZA201001898B (en) 2010-12-29
KR101484056B1 (ko) 2015-01-19
NZ584234A (en) 2012-12-21
US8344807B2 (en) 2013-01-01
EP2193601B1 (de) 2016-02-10

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